Towards a quantum Monte Carlo-based density functional including finite-range effects: Excitation modes of a K-39 quantum droplet (CROSBI ID 288941)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Cikojević, Viktor ; Vranješ Markić, Leandra ; Pi, Maocai ; Barranco, Mercedes ; Boronat, Jordi
engleski
Towards a quantum Monte Carlo-based density functional including finite-range effects: Excitation modes of a K-39 quantum droplet
Some discrepancies between experimental results on quantum droplets made of a mixture of 39 K atoms in different hyperfine states and their analysis within extended Gross-Pitaevskii theory (which incorporates beyond mean-field corrections) have been recently solved by introducing finite-range effects into the theory. Here we study the influence of these effects on the monopole and quadrupole excitation spectrum of extremely dilute quantum droplets using a density functional built from first-principles quantum Monte Carlo calculations, which can be easily introduced in the existing Gross- Pitaevskii numerical solvers. Our results show differences of up to 20 % with those obtained within the extended Gross- Pitaevskii theory, likely providing another way to observe finite-range effects in mixed quantum droplets by measuring their lowest excitation frequencies.
Bose-Bose mixture ; Monte Carlo ; density functional ; excitation ; droplet
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Podaci o izdanju
102 (3)
2020.
033335
9
objavljeno
2469-9926
2469-9934
10.1103/physreva.102.033335